Calculation of rose diagrams

Abstract

Rose diagrams are isothermal sections of multicomponent phase diagrams which show highly symmetric phase boundaries due to multiple demixing occurring in a single phase. They result from using a Gibbs energy which is symmetric in the component concentrations. The unique features of rose diagrams are discussed, in particular their dependence on the presence of degeneracy in the Gibbs energy. The implications of degenerate equilibria in the application of the phase rule are also discussed.